/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iceberg.spark;

import org.apache.iceberg.relocated.com.google.common.base.Preconditions;

/** Enumerates the types of Parquet readers. */
public enum ParquetReaderType {
  /** ICEBERG type utilizes the built-in Parquet reader. */
  ICEBERG,

  /**
   * COMET type changes the Parquet reader to the Apache DataFusion Comet Parquet reader. Comet
   * Parquet reader performs I/O and decompression in the JVM but decodes in native to improve
   * performance. Additionally, Comet will convert Spark's physical plan into a native physical plan
   * and execute this plan natively.
   *
   * <p>TODO: Implement {@link org.apache.comet.parquet.SupportsComet} in SparkScan to convert Spark
   * physical plan to native physical plan for native execution.
   */
  COMET;

  public static ParquetReaderType fromString(String typeAsString) {
    Preconditions.checkArgument(typeAsString != null, "Parquet reader type is null");
    try {
      return ParquetReaderType.valueOf(typeAsString.toUpperCase());
    } catch (IllegalArgumentException e) {
      throw new IllegalArgumentException("Unknown parquet reader type: " + typeAsString);
    }
  }
}
